Soft and hard hadronic processes in the nonperturbative approach of QCD - art. no. 056010

A two-component model to analyze both soft and hard hadronic processes at h igh energies is suggested. The model is based on the topological 1/N expans ion of the scattering amplitude and the theory of the supercritical Pomeron . The longitudinal component is given by the string model and determines th e behavior of the cross section on longitudinal variables. The dependence o n the transverse momentum is calculated on the basis of a two-gluon Pomeron model in which the Pomeron is modeled as an exchange of two nonperturbativ e gluons whose propagator is finite at q(2)=0. Hard scattering of quarks on the ends of quark-gluon strings is calculated as a sequence of multi-Pomer on exchanges. It is shown that the propagator which vanishes as (q(2))(-3) or faster allows one to reproduce hard distributions of secondary hadrons. The model is used to analyze the inclusive spectra of hadrons on the Feynma n variable x(F) and transverse momentum p(perpendicular to) up to 10 GeV/c in a wide energy interval.